UPSC : Editorial Analysis: The Debate Over Mega Dams in the Himalayas
Kartavya Desk Staff
*General Studies-2; Topic: India and its neighbourhood- relations.*
Introduction
• The approval of China’s 60 GW hydropower dam on the Yarlung Tsangpo River in Tibet, coupled with India’s plans for a 12 GW Upper Siang Project in Arunachal Pradesh, has brought global attention to the Himalayan region’s fragile ecosystem, geopolitical tensions, and energy aspirations.
• Both nations justify their projects in terms of energy security, flood control, and environmental goals like carbon neutrality, but these justifications raise significant concerns.
Key Features of the Projects
China’s Yarlung Tsangpo Dam
• Proposed Capacity: 60 GW, making it the largest hydropower dam in the world.
• Location: Mêdog County, Tibet, close to the Indian border.
• Purpose: Achieve carbon neutrality by 2060. Enhance energy security and economic development in Tibet. Control water flow for better flood management.
• Achieve carbon neutrality by 2060.
• Enhance energy security and economic development in Tibet.
• Control water flow for better flood management.
• Chinese Claims: Authorities argue the dam will not affect downstream water availability, a claim contested by India and Bangladesh.
India’s Upper Siang Project
• Proposed Capacity: 12 GW, positioned as a countermeasure to China’s dam.
• Location: Arunachal Pradesh, on the Siang River (Brahmaputra upstream).
• Purpose: Generate hydropower to meet India’s growing energy demands. Prevent flooding in Assam caused by potential water releases from the Chinese dam.
• Generate hydropower to meet India’s growing energy demands.
• Prevent flooding in Assam caused by potential water releases from the Chinese dam.
• Challenges: Fierce opposition from local communities due to displacement and environmental concerns. Feasibility issues due to the region’s seismic vulnerability and steep terrain.
• Fierce opposition from local communities due to displacement and environmental concerns.
• Feasibility issues due to the region’s seismic vulnerability and steep terrain.
Environmental and Ecological Risks
• a) Seismic Vulnerability
• The Himalayan region is one of the most seismically active areas in the world. The northeast Himalayan bend, where the projects are located, has experienced: 1950 Assam Earthquake: Magnitude 8.6, the largest continental earthquake ever recorded. 2015 Gorkha Earthquake (Nepal): Magnitude 7.8, which damaged 30 hydropower projects and reduced Nepal’s hydropower capacity by 20%.
• 1950 Assam Earthquake: Magnitude 8.6, the largest continental earthquake ever recorded.
• 2015 Gorkha Earthquake (Nepal): Magnitude 7.8, which damaged 30 hydropower projects and reduced Nepal’s hydropower capacity by 20%.
• Large reservoirs can alter the strain field, increasing the likelihood of earthquakes through reservoir-induced seismicity (RIS).
• b) Landslides and Glacier Lake Outbursts
• Landslides triggered by construction, deforestation, and seismic activity are common in the region.
• Glacier lake outbursts, intensified by climate change, pose additional threats to dam infrastructure and downstream populations.
• c) Siltation
• Steep slopes and heavy monsoon rainfall lead to massive siltation, which can reduce dam efficiency and lifespan.
• Post-earthquake landslides further exacerbate sedimentation, making large-scale projects unsustainable.
• d) Biodiversity Loss
• The Himalayan region is a biodiversity hotspot, hosting endangered species and unique ecosystems.
• Dam construction leads to habitat destruction, deforestation, and loss of aquatic biodiversity, including migratory fish species like the golden mahseer.
Geopolitical Ramifications
• a) China’s Control Over Water Resources
• As the upper riparian state, China controls the headwaters of the Yarlung Tsangpo (Brahmaputra) and has completed 11 out of 55 planned hydropower projects in Tibet.
• Unilateral dam-building gives China significant leverage over downstream water flow, potentially reducing water availability in India and Bangladesh, particularly during lean seasons.
• b) India’s Response
• India’s 12 GW Upper Siang Project aims to counter Chinese influence by controlling the river’s flow within its territory. However: The project raises similar objections from Bangladesh, a lower riparian state. It could lead to escalating water disputes between India and its neighbors.
• The project raises similar objections from Bangladesh, a lower riparian state.
• It could lead to escalating water disputes between India and its neighbors.
• c) Regional Cooperation or Competition
• Instead of pursuing unilateral projects, India and China should engage in transboundary water-sharing agreements.
• Failure to cooperate risks intensifying tensions in an already volatile geopolitical landscape.
Socioeconomic Challenges
• a) Displacement and Livelihood Loss
• India’s Upper Siang Project would displace thousands of indigenous people in Arunachal Pradesh, disrupting their traditional livelihoods and cultural ties to the land.
• Similar issues have been reported in China, where Tibetan communities face displacement for hydropower projects.
• b) Protest Movements
• Arunachal Pradesh has witnessed strong resistance to the Upper Siang Project, with residents opposing the lack of transparency and potential environmental damage.
• Activists argue that such large-scale projects prioritize national goals over local welfare.
• c) Economic Viability
• Large dams in the Himalayas often face cost overruns due to technical challenges, frequent maintenance needs, and risks from natural disasters.
• Heavy siltation and reduced efficiency further reduce their long-term financial viability.
Way Forward
• Collaborative Solutions
• Himalayan River Commission: A regional body involving China, India, Bangladesh, Nepal, and Bhutan to address water-sharing, flood management, and environmental conservation. Can promote transparent decision-making and conflict resolution.
• A regional body involving China, India, Bangladesh, Nepal, and Bhutan to address water-sharing, flood management, and environmental conservation.
• Can promote transparent decision-making and conflict resolution.
• Sustainable Alternatives
• Decentralized Renewable Energy: Shift focus to small-scale hydropower projects, solar, and wind energy to reduce ecological impacts.
• Shift focus to small-scale hydropower projects, solar, and wind energy to reduce ecological impacts.
• Watershed Management: Invest in reforestation, soil conservation, and rainwater harvesting to enhance water availability without large dams.
• Invest in reforestation, soil conservation, and rainwater harvesting to enhance water availability without large dams.
• Strengthening Legal and Policy Frameworks
• India and China must establish binding agreements to manage transboundary rivers sustainably.
• Strengthen disaster-resilient infrastructure and conduct robust environmental impact assessments.
Conclusion
• The Himalayan region, often referred to as the “Third Pole”, is critical to the survival of billions across South and Southeast Asia.
• China and India must prioritize regional cooperation, sustainable alternatives, and environmental conservation over a competitive dam-building spree.
• By working together to protect the Himalayas, both nations can ensure the long-term well-being of the region and its people.
Practice Question:
Discuss the implications of large hydropower projects on the fragile Himalayan ecosystem. Examine how the construction of mega dams, such as China’s Yarlung Tsangpo Dam and India’s Upper Siang Project, could impact biodiversity, water resources, and seismic vulnerability. (250 words)